Mössbauer spectroscopic study of a low temperature magnetic transition in ordered Fe-doped NiAl
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
Author(s)
Detail(s)
| Original language | English |
|---|---|
| Pages (from-to) | 175-183 |
| Journal / Publication | Hyperfine Interactions |
| Volume | 175 |
| Issue number | 1-3 |
| Publication status | Published - Feb 2007 |
| Externally published | Yes |
Link(s)
Abstract
Mössbauer spectroscopic (MS) measurements at ambient and cryogenic temperatures on powdered Fe-doped NiAl materials (Ni-40Al-9Fe and Ni-50Al-9Fe) exhibited paramagnetic behavior down to 17 K, with one Fe-site in the hosts. At 4.2 K, Ni-40Al-9Fe (Al deficient) remained paramagnetic, while Ni-50Al-9Fe (Ni deficient) displayed a magnetic transition, resolved in terms of one Fe environment. The internal magnetic field of the magnetically split site of Ni-50Al-9Fe was 185±8 kOe determined from a field distribution model. This shows that electronic and magnetic interactions in ordered Fe-doped NiAl depend on Fe site preference tendencies. The single Fe site observed at 4.2 K for the Ni-deficient alloy shows that its Fe distribution or site occupancy is not random but ordered. The interactions leading to the development of internal magnetic field in the Ni-deficient ordered alloy is temperature dependent being absent above 17 K based on MS measurements from ambient to 4.2 K. © 2008 Springer Science+Business Media B.V.
Research Area(s)
- Fe-doped Nickel aluminides based on NiAl, Magnetic transition, Mössbauer spectroscopy, Site occupancy preference
Citation Format(s)
Mössbauer spectroscopic study of a low temperature magnetic transition in ordered Fe-doped NiAl. / Uwakweh, Oswald N. C.; Liu, C. T.
In: Hyperfine Interactions, Vol. 175, No. 1-3, 02.2007, p. 175-183.
In: Hyperfine Interactions, Vol. 175, No. 1-3, 02.2007, p. 175-183.
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
